TM-V71A/V71E
48
ADJUSTMENT
Item
Condition
Measurement
Adjustment
Specifi cations / Remarks
Test-
equipment
Unit
Terminal
Unit
Parts
Method
6. SWR
protection
Adjust
• 144MHz band
1) Adj item: [SWR V]
Adjust: [
***
]
2) PTT: ON
Power meter Rear
panel
ANT
Front
panel
Tuning
control
Set the following
adjustment values
to the transceiver by
turning the Tuning
control.
Adjustment value:
66
• 430MHz band 3) Adj item: [SWR U]
Adjust: [
***
]
4) PTT: ON
Adjustment value:
120
7. DCS balance
(Band A)
Adjust
• 144MHz band
1) Adj item: [BAL A VC]
Adjust: [
***
]
Detector: +P HOLD
LPF: 3kHz
HPF: OFF
De-emphasis: OFF
2) PTT: ON
Linear
detector
Oscilloscope
By turning the Tuning
control, adjust the
modulation wave
until it becomes the
square wave.
• 430MHz band 3) Adj item: [BAL A UC]
Adjust: [
***
]
4) PTT: ON
8. DCS balance
(Band B)
Adjust
• 144MHz band
1) Adj item: [BAL B VC]
Adjust: [
***
]
Detector: +P HOLD
LPF: 3kHz
HPF: OFF
De-emphasis: OFF
2) PTT: ON
• 430MHz band 3) Adj item: [BAL B UC]
Adjust: [
***
]
4) PTT: ON
9. MAX
deviation
(Band A)
Adjust
• 144MHz band
1) Adj item: [DEV A V]
Adjust: [
***
]
AG: 1kHz/50mV
K,M4
AG: 1kHz/20mV
E
Detector: +P, –P
LPF: 15kHz
HPF: OFF
De-emphasis: OFF
2) PTT: ON
Linear
detector
Oscilloscope
AG
AF V.M
ANT
MIC
Write
4.2kHz±0.1kHz (According to
the P, –P)
• 430MHz band 3) Adj item: [DEV A U]
Adjust: [
***
]
4) PTT: ON
10. MAX
deviation
(Band B)
Adjust
• 144MHz band
1) Adj item: [DEV B V]
Adjust: [
***
]
AG: 1kHz/50mV
K,M4
AG: 1kHz/20mV
E
Detector: +P, –P
LPF: 15kHz
HPF: OFF
De-emphasis: OFF
2) PTT: ON
• 430MHz band 3) Adj item: [DEV B U]
Adjust: [
***
]
4) PTT: ON
Note:
Do not repeatedly adjust the SWR
protection adjustment; adjust it only
once when you replace the EEPROM
.